JP2018111181A - Jig saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig saw simple in structure.SOLUTION: A jig saw 1 comprises: a housing 2 having a left housing 15 and a right housing 16 and having a motor 32 and a slider 8 that are disposed inside the housing; a centrifugal fan 41 disposed inside the housing 2; a left groove part 158 and a right groove part 308 formed so as to recede outside in a widthwise direction in a portion extending forward from below the centrifugal fan 41 on an internal face of at least one of the left housing 15 and the right housing 16; and a guide member 110 disposed so as to communicate with the left groove part 158 and the right groove part 308 inside the housing 2. The left groove part 158, the right groove part 308, and the guide member 110 form an exhaust passage Z through which exhaust from the centrifugal fan 41 passes and whose exhaust port 169 is open toward a forward direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a jigsaw for cutting a workpiece with a blade.

Patent Document 1 below discloses a jigsaw in which a cutting blade (blade) is attached to a rod that protrudes downward in front of left and right halved housings and can reciprocate. A motor, which is a reciprocating drive source, is disposed in the housing, and a fan is attached to the motor. Exhaust air from the fan is guided to the first blowing passage and the second blowing passage. These blow-out passages are formed between the left (right) housing outer surface and a cover member attached to the outside of the housing, and the first blow-out passages are arranged so that the exhaust is directed to the top dead center of the rod attachment portion of the rod. The second blow-out passage is formed on the left and right, and is formed on the left and right so that the exhaust is directed to the cutting site. In addition, a dust collection path in the front-rear direction is formed below the housing, and a dust collection port (intake port) is opened at the front end of the dust collection path. By connecting a dust collector to the dust collection path, Cutting waste is sucked into the dust collection path.
In the following Patent Document 2, an air passage (blowing passage) that opens to the lower surface of the housing on the rear side of the blade and is connected to the blowing nozzle disposed in the center in the left-right direction is penetrated in the front-rear direction at the lower portion of the housing. A jigsaw is disclosed that includes a dust collection path that is opened as a dust collection port below the blowing nozzle, and a shutter member that closes the ventilation path when the dust collection nozzle is connected to the dust collection path.
Patent Document 3 below discloses a jigsaw in which a dust collection nozzle of a dust collection path is arranged at the center in the left-right direction.
Patent Document 4 below discloses that a dust suction nozzle of a jigsaw dust suction device is attached to the base of a jigsaw and arranged on the right or left side of the blade.

  The following Patent Documents 5 and 6 disclose a jigsaw in which a base that comes into contact with an upper surface of a material to be cut is attached to a lower surface of a housing by inserting a base fixing bolt.

Embodiment 2 of Patent Document 7 below discloses a top handle type jigsaw in which a handle extends between a front portion and a rear end of a housing. In this jigsaw, the battery pack is placed vertically with respect to the rear end surface of the housing and the rear end surface of the handle in order to shorten the front and rear length of the handle and to make it compact in the front and rear direction because it is relatively large in the vertical direction by installing the handle. It can be detached by sliding in the direction.
Further, Embodiment 1 discloses a body handle type jigsaw in which a non-slip portion is formed on an upper portion of a housing in a main body portion, and the anti-slip portion is gripped by an operator. In this jigsaw, since the housing (body) itself becomes a handle and becomes relatively small in the vertical direction, the length of the main body is made relatively large, and the battery pack is mounted on the lower surface of the rear part of the housing.

JP 2012-121116 A JP 2012-110977 A JP 2014-4666 A JP-A-8-244005 JP 2012-111021 A Japanese Patent Laid-Open No. 2015-24489 JP 2013-223899 A

In the jigsaw of Patent Document 1, since a blowing passage is formed between the cover member and the outer surface of the housing, the structure is complicated, and the blowing port and the dust collecting port are far from the blade.
In the jigsaw of Patent Document 2, since the shutter member is arranged, the structure is complicated, and since the blowout nozzle is arranged in the center in the left-right direction, the area where exhaust and dust collection act is relatively narrow, When the number of rotations of the fan is small, the strength of the blowout becomes relatively weak.
In the jigsaw of patent document 3, since a blowout port is not provided, cutting waste cannot be blown away, and dust collection efficiency is relatively poor.
In the dust suction device of Patent Document 4, since the blowout port is not provided, cutting waste cannot be blown off, the dust collection efficiency is relatively poor, and the dust collection nozzle is disposed only on the right side or the left side. The area where dust collection is applied is offset.
Accordingly, one of the main objects of the present invention is to provide a jigsaw having a simple structure, and a jigsaw having a wide area where air blowing and / or dust collection acts, and good efficiency. Is to provide.

Further, in the jigsaws of Patent Documents 5 and 6, since the base is directly bolted to the housing, the vibration between the base and the housing is relatively reduced due to the looseness of the bolt and the deflection of the housing near the bolt. It is easy to generate.
Accordingly, one of the main objects of the related invention is to provide a jigsaw in which the base is more firmly attached to the housing and vibrations in the base and the housing are suppressed.

Further, when an independent handle is desired, when the battery pack is disposed behind the rear end surface of the housing and the rear end surface of the handle as in the jigsaw of the second form of Patent Document 7, when the battery pack is not attached, In comparison, the front / rear length of the jigsaw at the time of attachment becomes longer, and when a battery pack with a larger capacity is attached, the front / rear length of the jigsaw becomes longer than when a battery pack with a smaller capacity is attached.
Therefore, one of the main objects of the related invention is a top handle type in which an independent handle is provided at the top of the electric motor, and the front and rear lengths are almost the same regardless of whether a battery with various capacities is attached or removed. It is to provide a jigsaw that is easy to handle without changing.

In order to achieve the above object, the invention described in claim 1 has a left housing and a right housing, a housing in which a motor and a drive unit are disposed inside, and a centrifugal disposed in the housing. A fan, and a groove portion formed on the inner surface of at least one of the left housing and the right housing so as to be recessed outward in the left-right direction at a portion extending from the lower side to the front side of the centrifugal fan; A guide member arranged to be continuous with the groove portion on the inner side, and the groove portion and the guide member form an exhaust passage through which the exhaust of the centrifugal fan passes and forward. The exhaust port is opened.
The invention according to claim 2 is characterized in that, in the above-mentioned invention, the guide member has a partition part for branching the exhaust passage left and right.
The invention according to claim 3 is characterized in that, in the above-mentioned invention, the guide member has a dust collection inlet that penetrates in the front-rear direction.
According to a fourth aspect of the present invention, in the above-described invention, a controller for controlling the motor is provided, and a cooling air inlet for cooling the motor is disposed in a portion of the housing behind the motor. The controller is arranged in a posture along a virtual straight line passing through the centrifugal fan and the cooling inlet.
According to a fifth aspect of the present invention, in the above invention, the battery for driving the motor is disposed behind the motor, and the dust suction adapter is connected to the hose of the dust collector below the battery. However, it is detachably arranged.
The invention according to claim 6 is characterized in that, in the above invention, the dust suction adapter has a bent portion connecting the front portion and the rear portion so that the rear portion is downward with respect to the front portion. It is.
According to a seventh aspect of the present invention, in the above invention, the base includes a base connected to the housing below the housing by a conductive fastening member disposed inside the housing. In the mounted state, it contacts the fastening member.

Further, the related invention is a resin housing, a jigsaw main body having a motor and a drive unit disposed inside the resin housing, a base that supports the jigsaw main body so as to be tiltable to the left and right, and the jigsaw main body as the base. A fastening member that presses toward the base, and a fastener that penetrates the base, the jigsaw body, and the fastening member, and fixes the jigsaw body to the base by pulling in the axial direction. The fastening member has a pressing surface extending in the front-rear direction.
Further, the related invention is characterized in that, in the above invention, the fastening member extends rearward of the fastener.
Furthermore, the related invention is characterized in that, in the above invention, the length in the front-rear direction on the pressing surface of the fastening member is at least half of the length in the front-rear direction on the contact surface between the jigsaw body and the base. To do.
Further, the related invention is characterized in that, in the above invention, the fastening member has an upright portion that stands up in the vertical direction and extends in the front-rear direction.
Further, the related invention is characterized in that, in the above invention, the front end portion of the fastening member is adjacent to a contact rib formed on the housing.
Furthermore, the related invention is characterized in that, in the above invention, the fastening member is a metal plate having a bent portion.
Further, the related invention is characterized in that, in the above invention, the fastening member is U-shaped in front view.
Furthermore, the related invention is characterized in that, in the above-mentioned invention, the fastening member has a fastener overlap portion that penetrates so that the fastener overlaps in a side view.
Further, according to the related invention, in the above invention, a small piece portion is formed in at least one of a front end portion and a rear end portion of the fastening member, and a small piece receiving portion for receiving the small piece portion is formed in the housing. It is characterized by this.
Further, the related invention is characterized in that, in the above invention, the small piece receiving portion is disposed above and below the small piece portion.

In addition, the related invention includes a jigsaw main body having a housing and a motor and a drive unit disposed inside the housing, a handle disposed on the jigsaw main body and above the motor, and a battery. A battery for supplying electric power to the motor, and a battery mounting portion provided in the jigsaw body portion and having a battery mounting portion side mounting surface. Can be attached to the battery mounting portion in a state where the battery mounting portion side mounting surface and the battery side mounting surface face each other by sliding in a direction along the battery mounting portion side mounting surface. It attaches with respect to a battery attachment part so that the said battery side attachment surface may become an upper part.
Furthermore, the related invention is characterized in that, in the above invention, the battery overlaps with the motor in a front view when attached to the battery mounting portion.
Furthermore, the related invention is characterized in that, in the above invention, the battery overlaps the handle in a top view in a state of being attached to the battery attachment portion.
Further, the related invention is the above invention, further comprising a plate-like controller for controlling the motor, wherein the controller is in a posture along the battery side attachment surface of the battery attached to the battery attachment portion, and It is arrange | positioned above a battery, It is characterized by the above-mentioned.
Furthermore, the related invention is characterized in that, in the above invention, the controller overlaps the handle in a top view.

One of the main effects related to the present invention is that a jigsaw having a simple structure is provided, and there is a wide area where at least one of air blowing and dust collection acts, and the efficiency of the jigsaw is good. To be offered.
One of the main effects related to the related invention is to provide a jigsaw in which the base is more firmly attached to the housing and vibrations in the base and the housing are suppressed.
One of the main effects related to the related invention is that in the top handle type in which an independent handle is provided on the upper part of the electric motor, the front and rear lengths are almost the same even when a battery of various capacities is attached or removed. It is to provide a jigsaw that is easy to handle.

It is a perspective view of the jigsaw which concerns on the 1st form of this invention. FIG. 2 is a front view of FIG. 1. It is a center longitudinal cross-sectional view of FIG. FIG. 4 is an enlarged view of the front part of FIG. 3. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is CC sectional view taken on the line of FIG. FIG. 4 is a sectional view taken along the vertical line DD in FIG. 3. It is DD horizontal line sectional drawing of FIG. It is the EE sectional view taken on the line of FIG. FIG. 4 is a perspective view of a left housing, a right housing, and a guide member in FIG. 3. It is a perspective view of the left housing of FIG. It is the (a) top view, (b) right side view, (c) front view, (d) perspective view of the base holder in FIG. It is a perspective view of the jigsaw which concerns on the 2nd form of this invention. FIG. 15 is a front view of FIG. 14. It is the center longitudinal cross-sectional view of FIG. It is a front enlarged view of FIG. It is the FF sectional view taken on the line of FIG. It is the GG sectional view taken on the line of FIG. It is the HH sectional view taken on the line of FIG. It is the II vertical sectional view taken on the line of FIG. It is JJ horizontal line sectional drawing of FIG. It is the KK sectional view taken on the line of FIG. It is a perspective view of the left housing in FIG. 16, a right housing, and a guide member. It is a perspective view of the left housing of FIG.

Hereinafter, embodiments of the present invention and modifications thereof will be described with reference to the drawings as appropriate.
The front, rear, top, bottom, left, and right in the embodiment and the modification are determined for convenience of explanation, and may change depending on the use state, the state of the moving member, and the like.
Further, the present invention is not limited to the following forms and modifications.

[First form]
1 is a perspective view of a rechargeable jigsaw 1 as an example of a cutting machine according to a first embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a central longitudinal sectional view of FIG. 4 is an enlarged view of the front part of FIG. 3, FIG. 5 is a cross-sectional view taken along line AA of FIG. 3, FIG. 6 is a cross-sectional view taken along line BB, and FIG. FIG. 8 is a DD vertical line cross-sectional view, FIG. 9 is a DD horizontal line cross-sectional view, and FIG. 10 is an EE cross-sectional view. The right side of FIG. 3 is the front of the jigsaw 1, the upper side of FIGS. 2 and 3 is the upper side of the jigsaw 1, and the right side of FIG. 2 is the left side of the jigsaw 1.

The jigsaw 1 has an internal mechanism (including a part exposed from the housing) inside a housing 2 serving as an outer shell.
The internal mechanism of the jigsaw 1 includes a power unit 3, a power transmission unit 4 as a reciprocating mechanism, a slider 8 as a driving unit to which a blade 6 can be attached and moved up and down (up and down reciprocating operation), An orbital motion mechanism 10 that swings the vertically moving blade 6 in the front-rear direction to move on an elliptical locus, a counterweight 12 for the vertically moving blade 6 and the slider 8, and a base 14 are included.

The housing 2 is made of resin (synthetic resin) and is divided into left and right halves, and includes a left housing 15 and a right housing 16.
The housing 2 includes a power base 3, a power transmission part 4, a slider 8, an orbital motion mechanism 10, a housing base 17 in which a counterweight 12 is disposed inside, and a handle formed above the housing base 17 (power part 3). Part 18.
The housing 2 and an internal mechanism at least partially disposed on the inside thereof constitute a main body portion P (jigsaw main body portion) of the jigsaw 1, and the handle portion 18 and the internal mechanism disposed on the inner side thereof handle the handle Q of the jigsaw 1. Configure. The jigsaw 1 is a top handle type in which a handle Q is disposed above the power unit 3. The handle Q may be composed of only the handle portion 18 of the housing 2, that is, the handle mechanism 18 may not be provided with an internal mechanism.

A battery mounting portion 20 having a battery connection terminal 19 is disposed on the lower surface of the rear portion of the housing base portion 17. The battery mounting portion 20 has a battery mounting portion side mounting surface M that extends in the front, rear, left, and right (slightly oblique in the rear-up state) and faces downward. A connection terminal 19 is arranged.
A battery 21 is attached to the battery attachment portion 20. The battery 21 is a rechargeable secondary battery, and has a battery side mounting surface N formed to correspond to the battery mounting portion side mounting surface M.
On the battery side mounting surface N, the battery terminals 22 are arranged so as to correspond to the battery connection terminals 19. The battery 21 slides forward in the direction along the battery mounting portion side mounting surface M in a state where the battery side mounting surface N is positioned on the upper surface and the battery terminal 22 is positioned on the upper surface. It is attached. When the battery 21 is attached to the battery attachment portion 20, the battery side attachment surface N faces the battery attachment portion side attachment surface M and faces upward, and the battery terminal 22 is electrically connected to the battery connection terminal 19 of the battery attachment portion 20. Connected. The battery 21 is a power supply source of the power unit 3.
The battery 21 has a battery claw 23 that is interlocked with a battery lever (not shown) provided so as to be movable downward while being urged upward at the rear portion. The battery nail receiving part 24 which receives the battery nail | claw 23 at the time of battery 21 attachment at the rear part is recessed. The battery 21 is detached from the battery mounting part 20 by lowering the battery lever and sliding the battery claw 23 away from the battery claw receiving part 24 while sliding backward.

A plate-like controller 25 that is thinner in the vertical direction than the front, rear, left, and right is disposed above the battery mounting portion 20. The controller 25 extends in the front-rear and left-right directions, and has a posture along the battery-side attachment surface N of the battery 21 attached to the battery attachment portion 20. The controller 25 is electrically connected to the battery 21 attached to the battery attachment portion 20 via the battery terminal 22 or the battery connection terminal 19. The controller 25 accommodates the circuit board 25 a in the same posture as the controller 25.
The controller 25 is disposed at the same position as a part (rear part) of the handle Q in the front-rear direction, and overlaps the handle Q in a top view.

A battery 21 (not shown) having a larger capacity than the illustrated battery 21 can be slidably mounted on the battery mounting portion 20. The large-capacity battery 21 also has a battery-side mounting surface N and a battery terminal 22 and is mounted in a state where the battery-side mounting surface N is at the top and faces the battery mounting portion-side mounting surface M.
The large-capacity battery 21 and the illustrated battery 21 (power tool battery) have the same size in the front-rear direction (longitudinal direction) in the illustrated state of the battery 21 as much as possible. The dimension of the (direction) is different from each other in accordance with the capacity. That is, the large-capacity battery 21 has the same size in the front-rear direction as the illustrated battery 21, and has a larger size in the left-right direction and the vertical direction (particularly the latter) than the illustrated battery 21. ing.

A switch 26 is arranged inside the handle portion 18, and a trigger 27 for switching the switch 26 is connected to the switch 26. The lower part of the trigger 27 is exposed downward from the lower part of the handle part 18.
A button type lock-on switch 28 is disposed on the left side of the switch 26. The button part of the lock-on switch 28 is exposed from the left surface of the left housing 15 above the trigger 27 of the handle part 18.
Further, a button-switching standby switch 29 is arranged on the front upper side of the housing 2 (the housing base portion 17 in front of the front end of the handle portion 18). The button part of the standby switch 29 is exposed on the upper surface of the housing 2.
In addition, a speed adjustment dial 30 is arranged on the upper left side of the battery mounting part 20 at the rear part of the housing base 17 and below the lower left side of the rear end of the handle part 18 with a part exposed from the housing 2. ing.

The power unit 3 includes an electric (DC) motor 32 disposed inside the central portion of the housing base 17.
The motor 32 is disposed in front of the battery mounting portion 20 and the battery 21. The battery 21 attached to the battery attachment portion 20 is disposed at the same height as the motor 32 in the vertical direction, and overlaps the motor 32 in front view. The battery 21 attached to the battery attachment portion 20 is disposed at the same position as a part (rear part) of the handle Q in the front-rear direction, and overlaps the handle Q in a top view.
The motor 32, the switch 26, the lock-on switch 28, the standby switch 29, and the speed adjustment dial 30 are electrically connected to the controller 25 (control circuit board 25a) via lead wires (not shown) (not shown). The controller 25 (control circuit board 25a) controls the drive of the motor 32.
The motor 32 is a brushless motor, and includes a rotor 33 that rotates around an axis and a stator 34 that is fixed to the housing 2.

The rotor 33 includes a motor shaft 35 that is a rotation shaft of the motor 32, a rotor core 36 that is provided integrally with the motor shaft 35 at the center of the motor shaft 35, and a plurality (four) of magnets 37.
Teeth are formed at the front end of the motor shaft 35.
The front portion of the motor shaft 35 is rotatably supported by a front bearing (ball bearing) 38, and the rear end portion of the motor shaft 35 is rotatably supported by a rear bearing (ball bearing) 39.
The front bearing 38 is held by the housing 2 via the bearing case 40, and the rear bearing 39 is held by the housing 2.

A centrifugal fan 41 that pushes air radially outward by rotation is fixed to the motor shaft 35 on the rear side of the front bearing 38.
In addition, a plurality of cooling inlets 42a that are slit-shaped in the front-rear direction and are arranged vertically are opened at the rear portion of the motor 32 in the left housing 15 (the rear side of the rear bearing 39). 16, a cooling inlet 42b having a slit shape in the front-rear direction is opened on the side of the battery mounting portion 20 (FIG. 11).
The controller 25 is arranged in a posture along a virtual straight line X (FIG. 3) passing through the centrifugal fan 41 and the cooling inlet 42b.

The stator 34 includes a cylindrical stator core 43 whose axial direction is the front-rear direction, a disk-shaped first insulating member 44 disposed on the front side of the stator core 43, and a disk disposed on the rear side of the stator core 43 or in the stator core 43. And a plurality of (here, six) coils 46, 46... Wound around the stator core 43 via the first insulating member 44 and the second insulating member 45.
On the rear side of the second insulating member 45, a disk-shaped sensor substrate 47 is installed by inserting a screw 48 into the second insulating member 45. A hole through which the motor shaft 35 is passed is formed in the center of the sensor substrate 47. The sensor substrate 47 has a plurality of (here, three) rotation detection elements (not shown) as rotation detection sensors for detecting the rotation position of the rotor 33. The rotation detection elements are magnetic sensors, and are arranged at equal intervals in the circumferential direction on the upper front surface of the sensor substrate 47.
The coils 46, 46... Are electrically connected to each other in a predetermined connection mode (delta connection), and are further electrically connected to the controller 25 via the terminal portion 49.

The controller 25 includes a switching element (not shown) that sequentially switches power supply to the coils 46 of the stator 34 in a predetermined manner. When the switch 26 is on, the rotation state of the rotor 33 is changed from the sensor substrate 47. In accordance with the rotation state of the rotor 33, a control signal is transmitted by a control circuit composed of a microcomputer, and a current is sequentially passed to each coil 46 by a drive circuit composed of a switching element. Execute 33 rotations.
Furthermore, the controller 25 is equipped with an auto-stop circuit (not shown) that cuts off the power supply to the motor 32 so as not to be overdischarged or overcurrent according to the detection result of the state of the battery 21.

  The power transmission unit 4 projects forward from the intermediate gear 50, a support shaft 51 in the front-rear direction passing through the center of the intermediate gear 50, and a front peripheral edge of the intermediate gear 50 via a shaft 52 and a bearing (needle bearing) 53. And a guide roller 54 arranged so as to be.

The intermediate gear 50 is disposed above the motor shaft 35 and is rotatably supported with respect to the support shaft 51. Bearings (needle bearings) 55 and 55 are interposed between the intermediate gear 50 and the support shaft 51. The bearings 55, 55 are arranged in the front-rear direction, the rear end abuts against the front surface of the bearing case 40, and the front end is pressed by the circlip 56.
The intermediate gear 50 is integrally provided with a tooth portion 60, a counterweight cam portion 61, and a push plate cam portion 62 in order from the front.
The tooth portion 60 has a disk shape and has teeth on the outer periphery that mesh with the teeth at the tip of the motor shaft 35.
The counterweight cam portion 61 has a disk shape having a smaller diameter than the tooth portion 60, and is arranged eccentrically on the rear surface side of the tooth portion 60.
The push plate cam portion 62 has a disk shape having a smaller diameter than the counterweight cam portion 61, and is arranged eccentrically with respect to the tooth portion 60 on the rear surface side of the counterweight cam portion 61.
Since the diameter (the number of teeth) of the tooth portion 60 of the intermediate gear 50 is larger than the diameter (the number of teeth) of the motor shaft 35 of the motor 32, the rotation of the motor shaft 35 is decelerated by the intermediate gear 50.
The support shaft 51 has a front end supported by the housing 2 and a rear end in a hole in the front-rear direction formed in the bearing case 40 (above the front bearing 38). The support shaft 51 passes through the center of the tooth portion 60.

The guide roller 54 is attached at a position eccentric with respect to the rotation center of the tooth portion 60 of the intermediate gear 50.
The guide roller 54 is eccentric to the side opposite to the counterweight cam portion 61 and the push plate cam portion 62 of the intermediate gear 50, that is, the counterweight cam portion 61 and the push plate cam portions 62 and 180 in the rotation direction of the tooth portion 60. Arranged to have an angle of °.
The shaft 52 of the guide roller 54 is attached to the peripheral portion of the intermediate gear 50 so as to protrude forward from the front portion thereof, and is rotatably supported by a bearing 53.

The slider 8 receives the power of the power unit 3 transmitted through the power transmission unit 4 and moves up and down by receiving the guide roller 54 so as to be reciprocally movable left and right.
The slider 8 has a slider body 69. The slider main body 69 is a plate-like member that extends vertically and horizontally.
The slider main body 69 has a hole 70 extending in the left-right direction at the center, and the hole 70 contains a guide roller 54. The guide roller 54 can move along the hole 70 by rotating in the hole 70 of the slider main body 69.
When the intermediate gear 50 rotates and the guide roller 54 is displaced (revolved), the vertical displacement component of the guide roller 54 is transmitted to the slider body 69. Therefore, the slider main body 69 moves up and down via the guide roller 54. The displacement component in the left-right direction during the revolution of the guide roller 54 is not transmitted to the slider main body 69 as the guide roller 54 rotates in the hole 70 of the slider main body 69 and reciprocates left and right.

The slider 8 includes a cylindrical blade guide 71 having a narrow hole for receiving the upper end portion of the blade 6 at the lower end portion, and a blade clamp 72 and a plate 73 that sandwich the upper end portion of the blade guide 71 in the front-rear direction. Yes.
The blade guide 71 receives the blade 6 in the narrow hole and holds the blade 6.
The upper end of the narrow hole of the blade guide 71 contains a spring 74 that is an elastic body, and the blade 6 pushed in the front-rear direction by the orbital motion mechanism 10 swings in a state in which the blade guide 71 is maintained. Is acceptable.
The blade clamp 72 and the plate 73 are fixed to each other with the slider main body 69 and the blade guide 71 interposed therebetween, and connect the slider main body 69 and the blade guide 71. The blade clamp 72, the plate 73, and the blade guide 71 holding the blade 6 move up and down together with the slider body 69.

A cylindrical slider guide 75 having a slit in the center is disposed adjacent to the upper portion of the slider body 69. The slit of the slider guide 75 contains the upper portion of the slider body 69 (the portion above the hole 70 and having a smaller size (width) in the left-right direction than the hole 70). The slider guide 75 is attached to the housing 2.
A cylindrical slider support 76 and a ring-shaped seal member 78 therebelow are arranged adjacent to the lower portion of the slider body 69. The slider support 76 and the seal member 78 are each attached to the housing 2.
The slider support 76 is disposed below the motor shaft 35, and the lower portion of the slider main body 69 is placed in the center hole thereof.
The seal member 78 is an elastic body (polyurethane sponge), and a lower portion of the slider main body 69 is placed in the center hole thereof. The seal member 78 is disposed above the top dead center of the blade guide 71 (the upper end of the range that moves up and down, the state shown in each drawing).
A wire guard 79 that is bent in a U-shape when viewed from the front and extends vertically is disposed in front of the blade guide 71 and the blade 6. The upper end of the guard 79 is supported by the housing 2. Yes. The guard 79 is omitted in FIG.

The orbital motion mechanism 10 is disposed in a push plate 80 that moves up and down in conjunction with the push plate cam portion 62 of the intermediate gear 50, a roller holder 82 that is disposed below the push plate 80, and an upper side of the roller holder 82. And a back roller 86 that is rotatably supported by the roller holder 82 via a shaft 85.
The push plate 80 is a plate-like member that extends in the vertical and horizontal directions. The push plate 80 has a hole having the same size as the push plate cam portion 62 at the upper portion, and the push plate cam portion 62 is inserted into the hole, that is, the push plate 80 is connected to the push plate cam portion 62 at the upper portion. Yes. When the intermediate gear 50 rotates and the push plate cam portion 62 rotates, the push plate 80 also rotates (moves up and down or moves left and right) around the upper hole. Since the push plate cam portion 62 has a relatively small amount of eccentricity, the amount of movement of the push plate 80 is also relatively small.
The roller holder 82 has a J-shaped side view that bends forward and a pair of plate-like hold portions 87 and 87, and an arm piece 88 that extends rearward in common from the upper portions of the hold portions 87 and 87. The roller holder 82 is swingably supported by a pin 89 at the upper end portion of the hold portion 87. The pin 89 is fixed to the housing 2. A back roller 86 is disposed at the lower front portion of the hold portion 87. Further, the lower end portion of the push plate 80 can contact the upper side of the arm piece 88. As the push plate 80 moves up and down, the lower end of the push plate 80 repeatedly pushes the arm piece 88, and the roller holder 82 swings around the pin 89.
The switching lever 84 extends in the left-right direction and is connected to the semi-cylindrical switching lever main body 90 disposed in the housing and the left end of the switching lever main body 90 and is exposed from the housing 2. And an operation unit 91. When the switching lever 84 is operated so that the curved surface of the switching lever main body 90 is down (the flat surface is up), the curved surface hits the upper portion of the arm piece 88 and the roller holder 82 is restricted so as not to swing. On the other hand, when the switching lever 84 is operated so that the curved surface of the switching lever main body 90 is upward (the state shown in FIGS. 3 and 4), the switching lever 84 is separated from the upper portion of the arm piece 88 and the roller holder 82 is allowed to swing. To do.
The back roller 86 can rotate along the rear side of the blade 6 and can push the blade 6 from the rear.
When the switching lever 84 is switched so as to allow the roller holder 82 to swing, the mounting position of the push plate cam portion 62 and the guide roller 54 is eccentric to the opposite side. Therefore, when the slider 8 moves upward, When the push plate 80 is lowered and the back roller 86 swings forward through the roller holder 82 and the slider 8 moves downward, the push plate 80 is lifted and the back roller 86 moves backward from the swing forward position. Return to the swing start position. Therefore, the back roller 86 pushes the blade 6 forward as the blade 6 rises, and does not push the blade 6 when the blade 6 descends, and makes the blade 6 orbital.

The counterweight 12 has a balance plate 100 that moves up and down in conjunction with the counterweight cam portion 61 of the intermediate gear 50.
The balance plate 100 is a plate-like member that is thicker than the push plate 80, extends in the vertical and horizontal directions, and is disposed on the front side of the push plate 80. A bulging portion 101 that bulges forward is formed on the upper portion of the balance plate 100, and the weight of the balance plate 100 is increased by that amount (in the upper portion opposite to the blade 6 below).
The central portion of the balance plate 100 is sandwiched between the tooth portion 60 of the intermediate gear 50 and the push plate 80, and the push plate 80 is sandwiched between the balance plate 100 and the bearing case 40.
The balance plate 100 has a cam hole 102 at the center. The left and right sizes of the cam hole portion 102 are set to allow rotation of the counterweight cam portion 61 (movement in the left-right direction), that is, the maximum eccentric portion of the counterweight cam portion 61 is left (right). Even in this state, the counterweight cam portion 61 is sized so as to be positioned in the cam hole portion 102.
When the intermediate gear 50 rotates and the counterweight cam portion 61 is displaced, the vertical displacement component of the counterweight cam portion 61 is transmitted to the cam hole portion 102, and the balance plate 100 moves up and down. It should be noted that the lateral displacement component of the counterweight cam portion 61 is not transmitted to the balance plate 100 as the counterweight cam portion 61 slides within the cam hole portion 102.
The weight of the balance plate 100 is set as follows. That is, the weight of the balance plate 100 and the weights of the blade 6 and the slider 8 are set to be balanced.

The counter weight cam portion 61 and the mounting position of the guide roller 54 are eccentric to the opposite side. Therefore, when the slider 8 moves upward, the balance plate 100 moves downward (as shown in the figure), and when the slider 8 moves downward, the balance plate 100 moves upward. Move up and down (in phase). Accordingly, the slider 8 and the balance plate 100 move up and down so as to have a symmetrical positional relationship with respect to the intermediate horizontal plane. The bulging portion 101 of the balance plate 100 is disposed on the upper side opposite to the blade 6, and the weight balance of the balance plate 100 is adjusted.
The weights of the slider 8 and the blade 6 and the weight of the counterweight 12 are substantially the same.
For these reasons, the vibration generated by the vertical movement of the slider 8 is canceled and suppressed by the vertical movement of the balance plate 100 (counter weight 12).

A guide member 110 for guiding air is provided on the lower front side of the housing 2, and a base holder 112 as a fastening member for fixing the base 14 is provided on the rear side.
11 is a perspective view of the left housing 15, the right housing 16, and the guide member 110, FIG. 12 is a perspective view of the left housing 15, and FIG. 13 is (a) a top view and (b) a right side view of the base holder 112. It is a figure, (c) front view, (d) is a perspective view. The right side of FIGS. 13A and 13B or the lower right side of FIG. 13D is the front.

The base holder 112 is U-shaped when viewed from the front, is Ω-shaped when viewed from the side, is made of metal, and exhibits electrical conductivity.
In the central portion of the base holder 112, connecting portions 120 and 120 that connect the upper portions of a pair of standing walls in the front portion 116 having a U-shaped cross section and the rear portion 118 having a U-shaped cross section are arranged. The left and right portions extending in the front-rear direction and standing up and down in the front part 116 and the connecting parts 120, 120 to the rear part 118 constitute an upright part, and are between the front part 116 and the rear part 118 and are connected parts. Between 120 and 120, a fastener overlap part is comprised. The front portion 116 and the rear portion 118 of the base holder 112 have left and right bent portions on the left and right sides. The base holder 112 is formed by bending or drawing (including a bead) on a portion that becomes a bent portion of the sheet metal.
A front small piece portion 122 is formed on the front side of the bottom portion of the front portion 116 of the base holder 112 and protrudes forward with respect to the other portions. A rear small piece portion 124 that protrudes rearward with respect to this portion is formed.
In the upper front part of the pair of upstanding walls in the front part 116 of the base holder 112, inclined parts 125, 125 that are in a chamfered state and are forwardly lowered are formed.
A bolt hole 126 as a fastening hole is formed at the bottom of the front portion 116 of the base holder 112.

The base holder 112 is held by a left holder case portion 130 protruding rightward at the lower side portion of the left housing 15 and a right holder case portion (not shown) protruding leftward similarly at the lower side portion of the right housing 16. Hereinafter, what is described about the left holder case portion 130 also applies to the right holder case portion unless otherwise specified. The holder case portion is formed by combining the left holder case portion 130 and the right holder case portion.
The left holder case portion 130 is widened in the front, rear, left, and right. A front rib 132 having an r-shape in side view extending upward and rearward is formed at a front end portion thereof, and a side view r extending upward and forward in a rear end portion. A letter-shaped rear rib 134 is formed. A front small piece portion 122 is contained in the front rib 132 of the left holder case portion 130 (and the front rib of the right housing 16). The front small piece portion 122 is in contact with the front rib 132 or the lower upper surface front end portion (front small piece receiving portion) of the holder case portion, and the front small piece receiving portion is disposed above and below the front small piece portion 122. Similarly, a rear small piece 124 is placed in the rear rib 134 or the lower upper surface rear end portion (rear small piece receiving portion) of the holder case portion, and the rear small piece receiving portion is disposed above and below the rear small piece portion 122. Yes. The front portion of the front rib 132 is formed as an inclined portion 135 that protrudes forward as it goes down. The inclined portion 135 is continuous with an extension line of the inclined portion 125 of the base holder 112.
The left housing 15 has a plurality of screw bosses 136, 136,... And the right housing 16 has screw holes 138, 138,... Corresponding to the screw bosses 136, 136,. When the left housing 15 and the right housing 16 are fixed to each other by being inserted, a screw boss 136 is disposed above the center portion of the left holder case portion 130. A screw hole 138 is disposed on the upper side of the center portion of the right holder case portion. The screw boss 136 is disposed below the connecting portion 120 of the base holder 112, and the base holder 112 has a shape that avoids the screw boss 136.
A left bolt hole 141 having a semi-cylindrical space is formed in a portion in front of the screw boss 136 in the left holder case portion 130, and is combined with a right bolt hole similarly formed in the right holder case portion. A bolt hole having a cylindrical space is formed. Above the bolt hole, the bolt hole 126 of the base holder 112 overlaps.
The upright portion of the base holder 112 is in contact with the inner surface of the housing 2 on the upper left and right sides of the holder case portion, but part or all of the upright portion may not be in contact with the inner surface of the housing 2.
A left pin support 142 for supporting the pin 89 of the roller holder 82 is formed in front of the front rib 132 of the left holder case 130 and at the front lower corner of the left housing 15. A left pin support portion 143 that supports the pin 89 of the roller holder 82 is formed at the front lower corner portion of the housing 116.

The base 14 is a plate-like member having a substantially flat bottom surface, and has a dome portion 144 that bulges upward in the center. The upper surface of the dome portion 144 is formed on a semi-cylindrical surface whose axial direction is the front-rear direction, and the dome portion 114 has an upper surface that is linear in the front-rear direction and bent in the left-right direction. In the center of the upper surface of the dome portion 114, a slit portion 145 is formed which is formed in a cross shape in a top view and extends in the front-rear and left-right directions.
The base 14 is fixed to the base holder 112 on the main body P side of the jigsaw 1 using a metal clamp plate 146 and bolts 147 (fasteners) that are U-shaped when viewed from the front.
That is, in the state where the clamp plate 146 is disposed below the slit portion 145 in the dome portion 114 of the base 14, the bolt hole formed in the center portion of the clamp plate 146, the slit portion 145, and the left holder case portion of the housing 2. The bolt 147 is inserted into the bolt hole 126 of the base holder 112 so that the bolt 147 passes through the 130 left bolt hole 141 and the right bolt hole, and the base 14 is fastened to the main body portion P. The base 14 is fixed to the housing 2 by sandwiching the periphery of the slit portion 145 of the dome portion 114 between the clamp plate 146 and the lower surface of the holder case portion of the housing 2. The bolt 147 passes through the dome portion 114 of the housing 2 and the base 14 and enters the bolt hole 126 to exert a tensile force in its own axial direction. The base 14 is fixed to the main body portion P of the jigsaw 1 by the tension. To do.
When the bolt 147 is passed in the front-rear direction part of the slit part 145, the posture of the main body part P of the jigsaw 1 is perpendicular to the base 14, and the bolt 147 is passed through an arbitrary part in the front-rear direction. The main body P slides back and forth with respect to the base 14.
When the bolt 147 is passed to the left of the slit portion 145, the posture of the body portion P of the jigsaw 1 is tilted to the left with respect to the base 14, and when the bolt 147 is passed to the right of the slit portion 145, the base 14 In contrast, the posture of the main body P of the jigsaw 1 is tilted to the right.
That is, the main body portion P of the jigsaw 1 can be fixed to the base 14 by adjusting the relative position in the front-rear direction and the tilt in the left-right direction with respect to the base 14, and can be moved in the front-rear direction. Can tilt.
With respect to the bolt 147 passed through the bolt hole 126 of the front portion 116 of the base holder 112, the base holder 112 extends in the front-rear direction, and particularly extends rearward.
When the main body portion P of the jigsaw 1 and the base 14 are fastened, the outer surface (lower surface, left surface, right surface) of the front portion 116 of the base holder 112 and the outer surface of the rear portion 118 serve as pressing surfaces, and the base holder 112 becomes the jigsaw 1. The main body part P (holder case part) is pressed toward the base 14 (downward). The main body P and the base 14 have contact surfaces extending in the front-rear direction on the lower surface of the housing 2 and the upper surface of the dome 114, and the length of the pressing surface of the base holder 112 in the front-rear direction (the front portion 116 and the rear portion). 118) is a half or more of the length in the front-rear direction on the contact surface of the main body P and the base 14. Further, the bolt 147 passes through the fastener overlap portion of the base holder 112, and the bolt 147 and the base holder 112 overlap in a side view.

Inside the left housing 15 and between the base holder 112 and the motor 32, a lower surface portion 152 of the left motor case portion 150 is disposed. In the right housing 16, a right motor case portion 150 </ b> R (FIGS. 5, 6, and 8) is similarly formed, and a motor case portion is formed together with the left motor case portion 150.
The left motor case portion 150 has a lower surface portion 152 that protrudes inward and a front surface portion 154 that extends upward from the front side portion of the lower surface portion 152, and the right motor case portion 150 </ b> R is similarly a lower surface portion. 152R and the front surface part 154R are provided, and a part of the motor 32 is disposed inside the motor case part. The motor shaft 35 passes through the front surface portions 154 and 154R, and the centrifugal fan 41 and the front bearing 38 are disposed in front of the front surface portions 154 and 154R (outward of the motor case portion).
From the lower side of the front surface part 154 of the left motor case part 150 to the upper side of the left pin support part 142 of the left housing 15 through the upper side of the inclined part 135 of the left holder case part 130, it projects inward from the inner surface of the left housing 15. A lower left rib 155 is disposed. The lower left rib 155 is lower than the front surface portion 154 in the left-right direction. Further, the lower left rib 155 is formed in a forwardly descending arc shape in a portion from the lower side of the front surface portion 154 to the upper side of the inclined portion 135, and the arc-shaped portion is along the inclined portion 135. Further, on the upper side of the lower left rib 155 (the lower side of the switching lever main body 90), a lower left adjacent rib 156 that has a predetermined interval along the lower left rib 155 and faces the lower left rib 155 is a lower left rib 155. It is formed so as to protrude inward in the same manner as in FIG. Similarly, the right housing 16 is formed with a lower right rib 305 and a lower right adjacent rib 306 (not shown). The rear surface of the lower left rib 155 is adjacent to the front surface of the left standing portion of the base holder 112 (the left inclined portion 125 of the front portion 116). Similarly, the rear surface of the lower right rib 305 is the right side of the front portion 116. Are adjacent to each other (abut rib).
A left bearing case holding rib 157 that protrudes inward (rightward) from the inner surface of the left housing 15 to hold the bearing case 40 is formed in front of the front surface portion 154 of the left motor case portion 150. Similarly, a right bearing case holding rib 307 (not shown) is formed in the housing 16, thereby forming a bearing case holding portion.
The front portion 154 of the left motor case 150, the left bearing case holding rib 157, and the space between the front portion 154 and the left bearing case holding rib 157 are formed so as to be recessed outward (leftward) in the left-right direction. It is the upper part of the left groove part 158. The lower portion of the left groove portion 158 is formed by the lower left rib 155 and the lower left adjacent rib 156 and the inner wall of the left housing 15 therebetween, and extends forward. Similarly, a right groove 308 is formed in the right housing 16.

Further, in the lower part of the left groove part 158 and the right groove part 308, the guide member so as to be continuous with the upper part of the left groove part 158 or the right groove part 308 in front from the lower front part 152, 152R of the lower surface part 152, 152R of the motor case part. 110 is arranged.
The guide member 110 is inclined so as to surround the inclined surface portion 160 that protrudes forward as it goes down, the front-view inverted T-shaped partition portion 162 that protrudes forward from the lower center of the inclined surface portion 160, and the rear surface of the inclined surface portion 160. An intake guide portion 164 protruding rearward from the upper side, the left side, and the right side of the surface portion 160; a dust collection intake port 166 that opens to penetrate in the front-rear direction below the partition portion 162 and the intake guide portion 164; An intake port guide portion 168 that is inclined in the same manner as the inclined surface portion 160 is provided below the intake port 166 for use.
The roller holder 82 is positioned in front of the inclined surface portion 160 and the intake port guide portion 168, and the partition portion 162 is interposed between the holding portions 87 and 87.
The upper rear portion of the intake guide portion 164 is in contact with the lower front portion of the motor case portion, and the left and right inclined rear sides of the intake guide portion 164 are the inclined portions 125 of the base holder 112 and the front ribs 132 of the holder case portion. It faces the same direction as the inclined portion 135.

When the centrifugal fan 41 is rotated by the rotation of the motor shaft 35, the pushed-out air flows between the left groove portion 158 and the right groove portion 308 (between the bearing case 40 and the push plate 80 lower portion and the front surface portions 154 and 154R of the motor case portion. ) And is exhausted through the upper side of the intake guide part 164 and the upper side (front side) of the inclined surface part 164 or the upper side of the partition part 162 (blower). The exhaust air is exhausted forward in a state of being branched left and right by a partitioning portion 162 having an inverted T-shaped cross section.
An exhaust passage Z is formed by the left groove portion 158, the right groove portion 308, and the guide member 110. In addition, a portion surrounded by the partition 162, the holding portions 87, 87, and the arm piece 88 is an exhaust port 169 that is partially separated (left and right) and opens forward.

A rear lower opening 170 is formed between the rear portion of the lower surface portion 152 of the left motor case portion 150 in the housing 2 and the upper surface of the rear rib 134 of the left holder case portion 130 (or a portion of the right housing 16 formed in the same manner). The tip of the dust suction adapter 172 can be inserted forward from the rear lower opening 170.
The dust suction adapter 172 is connected to a dust collector hose (not shown) and sucks air.
The dust suction adapter 172 is formed in a half cylinder shape, and includes a left dust suction adapter portion 173 and a right dust suction adapter portion 174.
The dust suction adapter 172 passes through the U-shaped base holder 112 in front view and comes into contact with the base holder 112, and the tip reaches the rear side of the intake guide portion 164 of the guide member 110. The dust collection adapter 172 and the dust collection intake port 166 of the guide member 110 communicate with each other through the rear surface of the inclined surface portion 160 and the partition portion 162 or the intake port guide portion 168 so that dust collection air can flow. A portion from the tip of the dust suction adapter 172 to the dust collection inlet 166 forms an intake passage Y, and the intake passage Y is connected to the hose of the dust collector via the dust suction adapter 172.
The dust suction adapter 172 is disposed below the battery 21 attached to the battery attachment portion 20 and can be removed by pulling it out from the rear lower opening 170.
The dust suction adapter 172 has a bent portion 178 that connects the front portion 176 and the rear portion 177 so that the rear portion 177 is downward with respect to the front portion 176.

An operation example of such a jigsaw 1 will be described.
The operator sets the blade 6 on the slider 8 in a stopped state so that the blade is in front, and the lower surface front portion of the base 14 is applied to the workpiece. When the handle portion 18 (handle Q) is gripped with the battery 21 attached to the battery attachment portion 20 and the switch 26 is turned on by operating the trigger 27, the controller 25 causes the speed adjustment dial 30 to be turned on. Electricity is supplied to the motor 32 according to the state, the motor shaft 35 rotates at a speed according to the state of the speed adjustment dial 30, and the intermediate gear 50 is rotated by the rotating motor shaft 35. However, when the lock-on switch 28 is on, the controller 25 supplies power to the motor 32 even when the trigger 27 is not operated and the switch 26 is off. Further, the controller 25 does not supply power to the motor 32 even if the trigger 27 is operated and the switch 26 is turned on when the standby switch 29 is turned on or the lock-on switch 28 is turned on.
As the intermediate gear 50 rotates, the slider 8 moves up and down via the guide roller 54. Further, the counterweight 12 (balance plate 100) moves up and down by the rotation of the counterweight cam portion 61 of the intermediate gear 50. Furthermore, when the push plate 80 moves up and down by the rotation of the push plate cam portion 62 of the intermediate gear 50 and the switching lever 84 is switched to the swing allowable position, the back roller 86 swings via the roller holder 82. To do. These vertical movements and swings are performed the same number of times (one time for each rotation of the intermediate gear 50).
The oscillating back roller 86 pushes the blade 6 forward as the blade 6 rises, and does not push the blade 6 when the blade 6 descends, but makes the blade 6 orbital.

The slider 8 moves up and down in a state where vibration is suppressed by a counterweight 12 (balance plate 100) that moves up and down symmetrically.
When the handle Q is pushed forward by the operator in the operating state of the slider 8 or the blade 6, the saw blade on the front side of the blade 6 moving up and down hits the workpiece, and the workpiece is cut with the front-rear direction as the cutting direction. Go. If the workpiece is cut while the blade 6 is pushed by the back roller 86 and orbitally moved, the blade 6 is moved upward and pushed forward, so that the cutting force is larger than the case where the orbital movement is not performed (pressing operation). Becomes lighter). When cutting the workpiece, the blade 6 receives a backward force (cutting resistance) from the workpiece.

Furthermore, when the housing 2 is in an arbitrary tilting posture with respect to the base 14 with the bolt 147 once loosened, and then the bolt 147 is tightened, the housing 2 is tilted by the base holder 112 and the clamp plate 146. It is fixed with.
The base holder 112 includes a bolt hole 126 in the front portion 116 and extends rearward from the bolt hole 126.

In addition, the centrifugal fan 41 is rotated by the rotation of the motor shaft 35, and the blade 6 in the vicinity of the base 14 from the exhaust port 169 is separated into the left and right by the partition 162 of the guide member 110 through the exhaust passage Z. To the left and right (left and right of the machining location).
Further, when the dust collector is operated in a state where the dust suction adapter 172 connected to the dust collector is inserted from the rear lower opening 170 of the housing 2, the vicinity of the dust collection inlet 166 of the guide member 110 (at the rear of the processing location). Air is sucked into the dust suction adapter 172 (the intake passage Y) from the intake port guide portion 168, the rear surface of the inclined surface portion 160 or the intake guide portion 164.
When the switch 26 is turned off by the operation of the trigger 27 or the standby switch 29 is turned on, the power supply to the motor 32 is stopped by the controller 25, the motor shaft 35 is stopped, and various vertical movements and swings are performed. Or exhaust stops.

The above jigsaw 1 has a left housing 15 and a right housing 16, a housing 2 in which a motor 32 and a slider 8 are disposed inside, a centrifugal fan 41 disposed inside the housing 2, and a left housing 15. And a left groove 158 and a right groove 308 formed so as to be recessed outward in the left-right direction at the inner surface of at least one of the right housing 16 and extending forward from below the centrifugal fan 41, And a guide member 110 disposed so as to be continuous with the left groove portion 158 and the right groove portion 308 on the inner side, and an exhaust passage Z is formed by the left groove portion 158, the right groove portion 308 and the guide member 110, and toward the front. An exhaust port 169 is opened. Therefore, the exhaust passage Z (blower) is simply formed by the left groove portion 158 and the right groove portion 308 of the housing 2 and the guide member 110.
The guide member 110 has a partition 162 that branches the exhaust passage Z to the left and right. Therefore, exhaust air directed toward both the left and right sides of the blade 6 is generated with a simple structure, air blowing efficiency is improved, and chips generated when the workpiece is cut are efficiently blown off.
Furthermore, the guide member 110 has a dust collection inlet 166 that penetrates in the front-rear direction. Therefore, the intake passage Y for collecting dust is simply configured (along with the exhaust passage Z).
In addition, a controller 25 for controlling the motor 32 is provided, and a cooling air inlet 42b for cooling the motor 23 is disposed in a portion of the housing 2 on the side of the battery mounting portion 20, and the controller 25 is arranged in a posture along a virtual straight line X passing through the centrifugal fan 41 and the cooling air inlet 42b. Therefore, the cooling air passes along the controller 25 and the controller 25 is efficiently cooled, and the cooling air is rectified in the direction of the virtual straight line X by the controller 25 and the motor 23 and the like are efficiently cooled. .
A battery 21 for driving the motor 32 is disposed behind the motor 32, and a dust suction adapter 172 connected to a dust collector hose is detachably disposed below the battery 21. Therefore, the battery 21, the dust suction adapter 172, and the hose are arranged so as not to interfere with each other.
Furthermore, the dust suction adapter 172 has a bent part 178 that connects the front part 176 and the rear part 177 so that the rear part 177 is downward with respect to the front part 176. Therefore, even when a large battery is mounted, the dust suction adapter 172 and the dust collector hose do not interfere with each other.
Furthermore, a base 14 connected to the housing 2 is provided below the housing 2 by a conductive base holder 112 disposed inside the housing 2, and the dust suction adapter 172 is mounted in the base holder 112. Contact with. Therefore, even if static electricity is generated in the dust suction adapter 172, it is diffused by the base holder 112, and accumulation of static electricity in the dust suction adapter 172 and the like is prevented.

In addition, the jigsaw 1 includes a resin-made housing 2, a main body portion P having a motor 32 and a slider 8 disposed therein, a base 14 that supports the main body portion P so as to be tiltable to the left and right, and the main body portion P. A base holder 112 that presses against the base 14; and a bolt 147 that penetrates the base 14, the main body P, and the base holder 112 and fixes the main body P to the base 14 by pulling in the axial direction. The base holder 112 has a pressing surface extending in the front-rear direction. Therefore, the base 14 is firmly fixed to the main body P by the base holder 112, and vibrations in the base 14 and the main body P are suppressed.
Further, the base holder 112 extends to the rear of the bolt 147. Therefore, the vibration generated by the reciprocating rotational motion about the rear of the slider 8 in the power transmission unit 4 is effectively suppressed by holding the rear as much as possible.
Furthermore, the length in the front-rear direction on the pressing surface of the base holder 112 is more than half of the length in the front-rear direction on the contact surface between the main body P and the base 14. Therefore, the length of the pressing surface of the base holder 112 is increased, the base 14 is more firmly fixed to the main body P, and vibrations in the base 14 and the main body P are further suppressed.
Furthermore, the base holder 112 has an upright portion that stands up and down and extends in the front-rear direction. Therefore, the rigidity of the base holder 112 itself is increased, and the base 14 is firmly fixed correspondingly.
In addition, the front end portion of the base holder 112 is adjacent to the lower left rib 155 and the lower right rib 305 formed in the housing 2. Accordingly, the base holder 112 is held at an appropriate position in the housing 2, and deformation of the housing 2 is prevented.
The base holder 112 is a metal plate having a bent portion. Therefore, the highly rigid base holder 112 is simply formed.
Furthermore, the base holder 112 is U-shaped when viewed from the front. Therefore, the rigidity of the base holder 112 itself is increased, and the base 14 is firmly fixed correspondingly.
Furthermore, the base holder 112 has a fastener overlap part that penetrates so that the bolt 147 overlaps in a side view. Therefore, the base holder 112 does not interfere with the bolt 147 and is efficiently disposed so as to surround the bolt 147.
In addition, a front small piece portion 122 is formed at the front end portion of the base holder 112 and a rear small piece portion 124 is formed at the rear end portion. A front small piece receiving portion (front rib) for receiving the front small piece portion 124 in the housing 2. 132) and a rear small piece receiving portion (rear rib 134) are formed. Therefore, the base holder 112 is held at an appropriate position in the housing 2.
Further, the front small piece receiving portion is disposed above and below the front small piece portion 122, and the rear small piece receiving portion is disposed above and below the rear small piece portion 124. Therefore, the movement of the base holder 112 can be restricted in the vertical direction, which is the thickness direction of the front small piece portion 122 and the rear small piece portion 124, and the thickness of the front small piece portion 122 and the rear small piece portion 124, that is, the thickness of the base holder 112 is Since the thickness of the plate material is easy to stabilize the dimensions, the front small piece portion 122, the rear small piece portion 124, the front small piece receiving portion, and the rear small piece receiving portion are easily formed.

Furthermore, the jigsaw 1 includes a housing 2 and a main body P having a motor 32 and a slider 8 disposed inside the housing 2, a handle Q disposed above the main body P and above the motor 32, and a battery side mounting. A battery 21 having a surface N and supplying power to the motor 32; and a battery mounting portion 20 provided on the main body portion P and having a mounting surface M on the battery mounting portion side. 21 can be mounted on the battery mounting portion 20 with the battery mounting portion side mounting surface M and the battery side mounting surface N facing each other by sliding in a direction along the battery mounting portion side mounting surface M. It attaches with respect to the battery attachment part 20 so that the battery side attachment surface N may become an upper part. Therefore, in the top handle type jigsaw 1 in which the independent handle Q is provided on the upper part of the motor 32, the front-rear length is not changed even if the battery 21 or the like having various capacities is attached or removed. Can be handled easily.
In addition, the battery 21 overlaps the motor 32 in a front view when attached to the battery attachment portion 20. Therefore, even if the battery mounting portion side mounting surface M is directed downward, the battery 21 is relatively high in the vertical direction, and a sufficient space for mounting the battery 21 is secured and the large capacity battery 21 is mounted. And the vibration is suppressed by the battery 21 approaching the motor 21.
Further, the battery 21 overlaps the handle Q in a top view when attached to the battery attachment portion 20. Therefore, the jigsaw 1 becomes more compact in the front-rear direction than in the case where there is no overlap.
Furthermore, a plate-like controller 25 for controlling the motor 32 is provided, and the controller 25 is disposed above the battery 21 in a posture along the battery-side attachment surface N of the battery 21 attached to the battery attachment portion 20. ing. Therefore, the jigsaw 1 is compact in the vertical direction, and in particular, the periphery of the battery mounting portion 20 is compact even when the large capacity battery 21 is mounted.
In addition, the controller 25 overlaps the handle Q in a top view. Therefore, the jigsaw 1 becomes compact in the front-rear direction.

[Second form]
14 to 25 correspond to FIGS. 1 to 12 of the jigsaw 201 according to the second embodiment of the present invention.
The jigsaw 201 according to the second embodiment is the same as the jigsaw 1 of the first embodiment except for the handle or various switches, and the same reference numerals are given to the members and parts that are the same as above.

The jigsaw 201 does not include an independent handle in the main body P, and the upper surface of the housing 202 that houses the power unit 3 is a body handle QB (body handle type).
The housing 202 has a left housing 215 and a right housing 216. The left housing 215 has a cooling air inlet 42c similar to the cooling air inlet 42a of the first embodiment, and the right housing 216 has a plurality of cooling air inlets 42d. Further, on the side of the battery mounting portion 20 in the right housing 16, a plurality of cooling inlets 42e that are slit-shaped in the front-rear direction and arranged in the front-rear direction are opened (FIG. 24).
The jigsaw 201 does not include the switch 26 or the trigger 27 in the first embodiment, but includes a switch 228 having an on button 226 and a standby button 227 instead. The on button 226 and the standby button 227 are exposed from the left surface of the housing 202. The controller 25 electrically connected to the switch 228 enters a standby state when the standby button 227 is pressed, and supplies power to the motor 32 when the on button 226 is pressed.

Since the jigsaw 201 of the second form has the same structure of the lower part of the housing 202 as the first form, the power unit 3, the power transmission unit 4, the slider 8, the orbital motion mechanism 10, the counterweight 12, and the base 14, It exhibits the same effect as the form.
In particular, the jigsaw 201 has a left housing 215 and a right housing 216, a housing 202 in which the motor 32 and the slider 8 are disposed, a centrifugal fan 41 disposed in the housing 202, and a left housing 215. And a left groove 158 and a right groove 308 formed so as to be recessed outward in the left-right direction in a portion extending from the lower side of the centrifugal fan 41 toward the front, on the inner surface of at least one of the right housing 216, And a guide member 110 disposed so as to be continuous with the left groove portion 158 and the right groove portion 308 on the inner side, and an exhaust passage Z is formed by the left groove portion 158, the right groove portion 308 and the guide member 110, and toward the front. An exhaust port 169 is opened. Therefore, the exhaust passage Z (blower) is simply formed by the left groove portion 158 and the right groove portion 308 of the housing 202 and the guide member 110.
The jigsaw 201 also includes a main body P having a resin housing 202, a motor 32 and a slider 8 disposed inside the resin housing 202, a base 14 that supports the main body P so as to be tiltable left and right, and a main body P. A base holder 112 that presses toward the base 14, and a bolt 147 that penetrates the base 14, the main body P, and the base holder 112 and fixes the main body P to the base 14 by pulling in the axial direction. The base holder 112 has a pressing surface extending in the front-rear direction. Therefore, the base 14 is firmly fixed to the main body P by the base holder 112, and vibrations in the base 14 and the main body P are suppressed.
Further, a controller 25 for controlling the motor 32 is provided, and a cooling air inlet 42e for cooling the motor 23 is disposed on the side of the battery mounting portion 20 in the housing 2. Are arranged in a posture along a virtual straight line X passing through the centrifugal fan 41 and the cooling inlet 42e. Therefore, the cooling air passes along the controller 25 and the controller 25 is efficiently cooled, and the cooling air is rectified in the direction of the virtual straight line X by the controller 25 and the motor 23 and the like are efficiently cooled. .

[Example of change]
In addition, this invention is not limited to the said form, For example, the following changes may be given suitably.
A rod may be provided in place of the slider or connected to the slider, and a blade may be attached to the rod. In this case, the drive unit is a rod. The rod may have a left and right support shaft at the top for orbital motion. The slider or rod can be formed into a columnar shape, an elliptical column shape, a quadrangular column shape, a hexagonal column shape, or the like.
The various cam portions in the intermediate gear may be separate from each other, may be supported by different shafts, may be driven by separate drive sources, and the phase is set to other than 0 ° or 180 °. May be.
The blade may have a blade other than a saw blade.
The exhaust port may be completely divided into left and right by, for example, the partition portion of the guide member partitioning the entire vertical direction of the exhaust port. Further, a part or the whole of the intake port may be divided into left and right by arranging a partition part at the intake port or its peripheral part.
The left and right housings can be changed in shape, material, etc., such that the lid-shaped left housing covers the bathtub-shaped right housing, or part or all of the housing is made of metal or elastic. . The shape and material of other members and parts can be changed.
The bolt (fastener) related to the base holder (fastening member) may be a pin, a latch, a clamp, a clip, or a combination thereof.

The battery may be a primary battery that cannot be charged.
Instead of power supply by a battery, power supply from a commercial power source by a power cord may be used.
The connection mode of the motor and the lead wire can be variously changed. The number and arrangement of various members such as the number of coils and magnets of the motor can be appropriately increased or decreased or can be different places. The arrangement of the various elements may be variously changed such that the switching element is provided on the sensor substrate. The motor may be a motor with a brush.
Various types of switches may be omitted as appropriate, may have other types, or may be provided with new switches.
The present invention may be applied to a reciprocating saw or a cutter instead of a jigsaw.

  1, 201 ·· Jigsaw, 2, 202 ·· Housing, 6 ·· Blade, 8 ·· Slider, 14 ·· Base, 15, 215 ·· Left housing, 16, 216 ·· Right housing, 20 ·· Battery mounting , 21 .. battery, 25 .. controller, 32 .. motor, 41 .. centrifugal fan, 42 b, 42 e .. cooling inlet, 110 .. guide member, 112 .. base holder (fastening member), 116 .. (base holder) front part (standing part, fastener overlapping part), 118 .. (base holder) rear part (standing part, fastener overlapping part), 118 .. (base holder) connecting part (Standing portion, fastener overlap portion), 122 ·· Front small piece portion (small piece portion), 124 · · Rear small piece portion (small piece portion), 132 · · Front rib (front piece receiving portion), 134 · · Rear rib ( Small piece receiving part), 147, bolt (fastener), 155, lower left rib (abutment rib, exhaust passage), 158, left groove part (groove part), 162, partition part, 166, dust collecting inlet 169 .... Exhaust port, 172 ... Dust absorption adapter, 176 ... Front part of dust absorption adapter, 177 ... Rear part of dust absorption adapter, 178 ... Bending part of dust absorption adapter, 308 ... Right groove part (Groove), M ·· Battery mounting side mounting surface, N ·· Battery side mounting surface, P ·· (Jigsaw's) main body, Q ·· Handle, X ·· Virtual straight line, Y ·· Intake passage, Z ..Exhaust passage.

Claims (7)

A housing having a left housing and a right housing, in which a motor and a drive unit are disposed;
A centrifugal fan disposed inside the housing;
A groove portion formed on the inner surface of at least one of the left housing and the right housing and recessed outward in the left-right direction in a portion extending forward from below the centrifugal fan;
A guide member arranged to be continuous with the groove inside the housing;
With
An exhaust passage is formed by the groove and the guide member, and an exhaust port opens forward. The jigsaw according to claim 1, wherein the guide member has a partition portion that branches the exhaust passage to the left and right. 3. The jigsaw according to claim 1, wherein the guide member has a dust collection intake port penetrating in the front-rear direction. 4. A controller for controlling the motor;
A cooling air inlet for cooling the motor is disposed in a portion of the housing at the rear of the motor,
4. The jigsaw according to claim 1, wherein the controller is disposed in a posture along a virtual straight line passing through the centrifugal fan and the cooling air inlet. 5. A battery for driving the motor is disposed behind the motor;
The jigsaw according to any one of claims 1 to 4, wherein a dust suction adapter connected to a hose of a dust collector is detachably disposed below the battery. 6. The jigsaw according to claim 5, wherein the dust suction adapter has a bent portion that connects the front portion and the rear portion such that the rear portion is downward with respect to the front portion. A fastening member disposed on the inner side of the housing and having a base connected to the housing below the housing;
The jigsaw according to claim 5 or 6, wherein the dust suction adapter is in contact with the fastening member in an attached state.

Images